Pneumatic conveying method for removing dust and crude ash in dry process of converter gas

Abstract

The invention relates to a pneumatic conveying method for removing dust and crude ash in a dry process of converter gas. The method comprises the following steps of S1, constructing a pneumatic conveying system for removing dust and crude ash in the dry process of converter gas; S2, feeding: a pneumatic plate insertion valve (4), a first manual plate insertion valve (5) and a first pneumatic double-gate plate valve (6) are in an open state, and ash is discharged into a cabin pump (9); S3, fluidization: a pneumatic ball valve (17) is opened, and nitrogen enters into a first fluidization device in the cabin pump (9) from a gas storage tank (16); S4, conveying: after a second pneumatic double-gate plate valve (18) is opened, the uniformly fluidized gas and ash mixture is conveyed into a crude ash cabin (20) through a pneumatic conveying pipe (19); S5, sweeping, and S6, moving by transportation. By adopting the method, a common ash transportation cart can be used for transporting ash, the investment is greatly lowered, and the cost is saved. The method solves the problem that the height of an evaporative cooling tower is limited during the transformation of dust removal in the dry process, the method is particularly suitable for the project that dust removal of once flue gas in a converter via a wet process is transformed into a dry process, and the method has wide application prospect.

Description

technical field [0001] The invention relates to the field of environmental protection, and more specifically relates to a pneumatic conveying method for dry dust removal of converter gas and coarse ash. Background technique [0002] With the continuous strengthening of environmental protection awareness, most of the newly built and rebuilt converters adopt dry dust removal. The coarse ash collected by the banana bend under the evaporative cooling tower is sent to the coarse ash bin in the main workshop of the converter under the action of gravity through the built-in chain conveyor, pneumatic flap valve and pneumatic double flap valve, and the coarse ash is directly discharged by the vacuum suction tanker Comprehensive utilization of Sinotrans. [0003] The main problems of the existing converter gas dry dedusting coarse ash conveying system are as follows: First, the coarse ash bin is located in the main workshop of the converter, which is often limited by the layout condi...

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Problems solved by technology

[0003] The main problems of the existing converter gas dry dedusting coarse ash conveying system are as follows: First, the coarse ash bin is located in the main workshop of the converter, which is often limited by the layout conditions of the steelmaking process. A large amount of indoor space; second, the price of each vacuum suction tanker is about 1 million yuan, and the investment is relatively high

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